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Pulleys and Wheel and Axle Worksheet

Engineering lesson 14: Pulleys and the wheel and axle · Set 262 · 40 questions
TalentJR

Engineer's tip (Count the ropes): Fixed pulley: changes direction, effort = load. Pulley system: effort = load ÷ supporting rope sections; rope pulled = lift height × that number. Wheel and axle: MA = wheel radius ÷ axle radius; effort = load ÷ MA.

NameDateTime takenScore ___ / 40
  1. 1.True or false: a fixed pulley halves the effort. (a) False (b) True
  2. 2.🪝 A bucket weighing 480 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  3. 3.🪝 A well winch has a handle (wheel) of radius 12 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
  4. 4.🪝 A bucket weighing 30 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  5. 5.True or false: a fixed pulley stays in one place. (a) True (b) False
  6. 6.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
  7. 7.🪝 A winch has a wheel of radius 32 cm and an axle of radius 4 cm. What effort on the wheel lifts a 240 N bucket on the axle, in newtons? (ideal)
  8. 8.True or false: a fixed pulley needs effort = load. (a) True (b) False
  9. 9.🪝 A pulley system lifts a 680 N load with an effort of 170 N. What is its mechanical advantage (MA)?
  10. 10.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the colour of rope (c) the size of the load (d) gravity
  11. 11.🪝 A winch has a wheel of radius 12 cm and an axle of radius 3 cm. What effort on the wheel lifts a 560 N bucket on the axle, in newtons? (ideal)
  12. 12.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
  13. 13.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a movable pulley (b) a fixed pulley
  14. 14.🪝 More rope sections holding a load means … (a) less effort needed (b) more effort needed (c) the load floats (d) no change
  15. 15.True or false: a movable pulley makes you pull 2× rope. (a) False (b) True
  16. 16.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
  17. 17.True or false: a movable pulley only changes direction. (a) True (b) False
  18. 18.🪝 A load of 560 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  19. 19.🪝 A load of 540 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  20. 20.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
  21. 21.🪝 A bucket weighing 360 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  22. 22.True or false: a fixed pulley hangs on the rope loop. (a) True (b) False
  23. 23.🪝 A load of 320 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  24. 24.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 1 m, how many metres of rope must you pull?
  25. 25.🪝 A bucket weighing 140 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
  26. 26.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 3 m, how many metres of rope must you pull?
  27. 27.🪝 A load of 330 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  28. 28.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
  29. 29.🪝 A wheel and axle is a big wheel fixed to … (a) a smaller rod (axle) (b) a flat ramp (c) a loose rope (d) a sharp wedge
  30. 30.True or false: a movable pulley needs effort = load. (a) True (b) False
  31. 31.🪝 A pulley system lifts a 900 N load with an effort of 300 N. What is its mechanical advantage (MA)?
  32. 32.True or false: a movable pulley rises with the load. (a) True (b) False
  33. 33.🪝 A well winch has a handle (wheel) of radius 40 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
  34. 34.True or false: a fixed pulley is on a flagpole top. (a) True (b) False
  35. 35.True or false: a movable pulley stays in one place. (a) False (b) True
  36. 36.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
  37. 37.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
  38. 38.🪝 A load of 780 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
  39. 39.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 10 m, how many metres of rope must you pull?
  40. 40.True or false: a movable pulley is on a flagpole top. (a) True (b) False

Answer key

  1. False
  2. 480
  3. 4
  4. 30
  5. True
  6. a movable pulley
  7. 30
  8. True
  9. 4
  10. the direction of pull
  11. 140
  12. a fixed pulley
  13. a movable pulley
  14. less effort needed
  15. True
  16. a fixed pulley
  17. False
  18. 280
  19. 180
  20. 36
  21. 360
  22. False
  23. 80
  24. 3
  25. 140
  26. 3
  27. 110
  28. a fixed pulley
  29. a smaller rod (axle)
  30. False
  31. 3
  32. True
  33. 8
  34. True
  35. False
  36. 4
  37. a movable pulley
  38. 260
  39. 20
  40. False

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